
package com.hkfn.rfb.common.utils;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;

public class ScreenUtils {
    public static int convertDpToPixel(Context context, float dp) {
        DisplayMetrics metrics = context.getResources().getDisplayMetrics();
        float px = dp * (metrics.densityDpi / 160f);
        return (int) px;
    }
    
    /** 
     * 获得屏幕宽度
     *  
     * @param context 
     * @return 
     */  
    public static int getScreenWidth(Context context)
    {  
        WindowManager wm = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics outMetrics = new DisplayMetrics();
        wm.getDefaultDisplay().getMetrics(outMetrics);  
        return outMetrics.widthPixels;  
    }  
  
    /** 
     * 获得屏幕高度
     *  
     * @param context 
     * @return 
     */  
    public static int getScreenHeight(Context context)
    {  
        WindowManager wm = (WindowManager) context
                .getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics outMetrics = new DisplayMetrics();
        wm.getDefaultDisplay().getMetrics(outMetrics);  
        return outMetrics.heightPixels;  
    }  
  
    /** 
     * 获得状态栏的高度 
     *  
     * @param context 
     * @return 
     */  
    public static int getStatusHeight(Context context)
    {
        int result = 0;
        int resourceId = context.getResources().getIdentifier("status_bar_height", "dimen", "android");
        if (resourceId > 0) {
            result = context.getResources().getDimensionPixelSize(resourceId);
        }
        return result;
//        int statusHeight = -1;
//        try
//        {
//            Class<?> clazz = Class.forName("com.android.internal.R$dimen");
//            Object object = clazz.newInstance();
//            int height = Integer.parseInt(clazz.getField("status_bar_height")
//                    .get(object).toString());
//            statusHeight = context.getResources().getDimensionPixelSize(height);
//        } catch (Exception e)
//        {
//            e.printStackTrace();
//        }
//        return statusHeight;
    }
  
    /** 
     * 获取当前屏幕截图，包含状态栏 
     *  
     * @param activity 
     * @return 
     */  
    public static Bitmap snapShotWithStatusBar(Activity activity)
    {  
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);  
        view.buildDrawingCache();  
        Bitmap bmp = view.getDrawingCache();
        int width = getScreenWidth(activity);  
        int height = getScreenHeight(activity);  
        Bitmap bp = null;
        bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
        view.destroyDrawingCache();  
        return bp;  
  
    }  
  
    /** 
     * 获取当前屏幕截图，不包含状态栏 
     *  
     * @param activity 
     * @return 
     */
    public static Bitmap snapShotWithoutStatusBar(Activity activity)
    {  
        View view = activity.getWindow().getDecorView();
        view.setDrawingCacheEnabled(true);  
        view.buildDrawingCache();  
        Bitmap bmp = view.getDrawingCache();
        Rect frame = new Rect();
        activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);  
        int statusBarHeight = frame.top;  
  
        int width = getScreenWidth(activity);  
        int height = getScreenHeight(activity);  
        Bitmap bp = null;
        bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
                - statusBarHeight);  
        view.destroyDrawingCache();  
        return bp;  
    }
    
    
    public static void setMargins (View v, int l, int t, int r, int b) {
        if (v.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
            ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) v.getLayoutParams();
            p.setMargins(l, t, r, b);
            v.requestLayout();
        }  
    }

    //当 View 有一点点不可见时立即返回false!
    public static int isVisibleLocal(View target){
        Rect rect =new Rect();
        target.getLocalVisibleRect(rect);
        return rect.top;
    }
}
